package com.wang.gulimall.ware.service.impl;

import com.alibaba.fastjson.TypeReference;
import com.baomidou.mybatisplus.core.conditions.query.QueryWrapper;
import com.baomidou.mybatisplus.core.metadata.IPage;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import com.wang.common.exception.NoStockException;
import com.wang.common.to.OrderTo;
import com.wang.common.to.SkuHasStockTo;
import com.wang.common.to.mq.StockDetailTo;
import com.wang.common.to.mq.StockLockedTo;
import com.wang.common.utils.PageUtils;
import com.wang.common.utils.Query;
import com.wang.common.utils.R;
import com.wang.gulimall.ware.dao.WareSkuDao;
import com.wang.gulimall.ware.entity.WareOrderTaskDetailEntity;
import com.wang.gulimall.ware.entity.WareOrderTaskEntity;
import com.wang.gulimall.ware.entity.WareSkuEntity;
import com.wang.gulimall.ware.feign.OrderFeignService;
import com.wang.gulimall.ware.feign.ProductFeignService;
import com.wang.gulimall.ware.service.WareOrderTaskDetailService;
import com.wang.gulimall.ware.service.WareOrderTaskService;
import com.wang.gulimall.ware.service.WareSkuService;
import com.wang.gulimall.ware.vo.OrderItemVo;
import com.wang.gulimall.ware.vo.OrderVo;
import com.wang.gulimall.ware.vo.SkuWareHasStock;
import com.wang.gulimall.ware.vo.WareSkuLockVo;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;
import org.springframework.util.StringUtils;

import java.util.Date;
import java.util.List;
import java.util.Map;
import java.util.stream.Collectors;


@Service("wareSkuService")
@RabbitListener(queues = "stock.release.stock.queue")
public class WareSkuServiceImpl extends ServiceImpl<WareSkuDao, WareSkuEntity> implements WareSkuService {

    @Autowired
    WareSkuDao wareSkuDao;

    @Autowired
    ProductFeignService productFeignService;

    @Autowired
    private WareOrderTaskService wareOrderTaskService;

    @Autowired
    private WareOrderTaskDetailService wareOrderTaskDetailService;

    @Autowired
    private RabbitTemplate rabbitTemplate;

    @Autowired
    private OrderFeignService orderFeignService;


    @Override
    public PageUtils queryPage(Map<String, Object> params) {
        /**
         * skuId: 1
         * wareId: 2
         */
        QueryWrapper<WareSkuEntity> queryWrapper = new QueryWrapper<>();
        String skuId = (String) params.get("skuId");
        if (!StringUtils.isEmpty(skuId)) {
            queryWrapper.eq("sku_id", skuId);
        }

        String wareId = (String) params.get("wareId");
        if (!StringUtils.isEmpty(wareId)) {
            queryWrapper.eq("ware_id", wareId);
        }


        IPage<WareSkuEntity> page = this.page(
                new Query<WareSkuEntity>().getPage(params),
                queryWrapper
        );

        return new PageUtils(page);
    }

    @Override
    public void addStock(Long skuId, Long wareId, Integer skuNum) {
        //1、判断如果还没有这个库存记录新增
        List<WareSkuEntity> entities = wareSkuDao.selectList(new QueryWrapper<WareSkuEntity>().eq("sku_id", skuId).eq("ware_id", wareId));
        if (entities == null || entities.size() == 0) {
            WareSkuEntity skuEntity = new WareSkuEntity();
            skuEntity.setSkuId(skuId);
            skuEntity.setStock(skuNum);
            skuEntity.setWareId(wareId);
            skuEntity.setStockLocked(0);
            //TODO 远程查询sku的名字，如果失败，整个事务无需回滚
            //1、自己catch异常
            //TODO 还可以用什么办法让异常出现以后不回滚？高级
            try {
                R info = productFeignService.info(skuId);
                Map<String, Object> data = (Map<String, Object>) info.get("skuInfo");
                if (info.getCode() == 0) {
                    skuEntity.setSkuName((String) data.get("skuName"));
                }
            } catch (Exception e) {
            }
            wareSkuDao.insert(skuEntity);
        } else {
            wareSkuDao.addStock(skuId, wareId, skuNum);
        }

    }

    @Override
    public List<SkuHasStockTo> getSkuHasStock(List<Long> skuIds) {
        List<SkuHasStockTo> skuHasStockVos = skuIds.stream().map(item -> {
            Long count = this.baseMapper.getSkuStock(item);
            SkuHasStockTo skuHasStockTo = new SkuHasStockTo();
            skuHasStockTo.setSkuId(item);
            skuHasStockTo.setHasStock(count == null ? false : count > 0);
            return skuHasStockTo;
        }).collect(Collectors.toList());
        return skuHasStockVos;
    }


    /**
     * 为某个订单锁定库存 下订单的同时发送远程调用锁定库存
     *
     * @param vo
     * @return
     */

    @Transactional(rollbackFor = Exception.class)//只要出现没有库存的异常就进行回滚
    @Override
    public boolean orderLockStock(WareSkuLockVo vo) {
        //保存库存工作单详情信息
        WareOrderTaskEntity wareOrderTaskEntity = new WareOrderTaskEntity();
        wareOrderTaskEntity.setOrderSn(vo.getOrderSn());
        wareOrderTaskEntity.setCreateTime(new Date());
        wareOrderTaskService.save(wareOrderTaskEntity);

        //1、按照下单的收货地址，找到一个就近仓库，锁定库存
        //2、找到每个商品在哪个仓库都有库存
        List<OrderItemVo> locks = vo.getLocks();

        List<SkuWareHasStock> collect = locks.stream().map((item) -> {
            SkuWareHasStock stock = new SkuWareHasStock();
            Long skuId = item.getSkuId();
            stock.setSkuId(skuId);
            stock.setNum(item.getCount());
            //查询这个商品在哪个仓库有库存
            List<Long> wareIdList = wareSkuDao.listWareIdHasSkuStock(skuId);
            //设置有库存的库存Id
            stock.setWareId(wareIdList);
            return stock;
        }).collect(Collectors.toList());

        //2、锁定库存
        for (SkuWareHasStock hasStock : collect) {
            boolean skuStocked = false;
            Long skuId = hasStock.getSkuId();
            //含有库存的库存Id
            List<Long> wareIds = hasStock.getWareId();
            //如果查出来仓库id为空的话失败
            if (org.springframework.util.StringUtils.isEmpty(wareIds)) {
                //没有任何仓库有这个商品的库存
                //失败快速抛出异常
                throw new NoStockException(skuId);
            }

            //1、如果每一个商品都锁定成功,将当前商品锁定了几件的工作单记录发给MQ
            //2、锁定失败。前面保存的工作单信息都回滚了。发送出去的消息，即使要解锁库存，由于在数据库查不到指定的id，所有就不用解锁
            for (Long wareId : wareIds) {
                //锁定成功就返回1，失败就返回0
                log.error("库存服务开始锁定库存");
                Long count = wareSkuDao.lockSkuStock(skuId, wareId, hasStock.getNum());
                if (count == 1) {
                    log.error("库存服务锁定库存成功");
                    skuStocked = true;
                    WareOrderTaskDetailEntity taskDetailEntity = new WareOrderTaskDetailEntity(
                            null,
                            skuId,
                            null,
                            hasStock.getNum(),
                            wareOrderTaskEntity.getId(),
                            wareId,
                            1
                    );
                    //保存库存详情单
                    wareOrderTaskDetailService.save(taskDetailEntity);
                    log.error("锁定库存细节信息成功");
                    //库存锁定成功将消息发给交换机
                    //TODO 告诉MQ库存锁定成功
                    //  id :17  StockDetailTo(id=5, skuId=1, skuName=null, skuNum=18, taskId=17, wareId=1, lockStatus=1)
                    StockLockedTo lockedTo = new StockLockedTo();
                    //工作单id
                    lockedTo.setId(wareOrderTaskEntity.getId());
                    StockDetailTo detailTo = new StockDetailTo();
                    BeanUtils.copyProperties(taskDetailEntity, detailTo);
                    lockedTo.setDetailTo(detailTo);
                    log.error("发送锁定库存成功给延时队列");
                    rabbitTemplate.convertAndSend("stock-event-exchange", "stock.locked", lockedTo);
                    //(String exchange, String routingKey, Object object)
                    break;
                } else {
                    //当前仓库锁失败，重试下一个仓库
                }
            }

            if (skuStocked == false) {
                //当前商品所有仓库都没有锁住
                throw new NoStockException(skuId);
            }
        }
        //3、肯定全部都是锁定成功的
        return true;
    }


    //根基库存工作单进行解锁，到了时间自动解锁 补偿解锁逻辑
    @Transactional
    @Override
    public void unlockStock(StockLockedTo to) {
        //库存工作单的id
        StockDetailTo detail = to.getDetailTo();
        Long detailId = detail.getId();
        /**
         * 解锁
         * 1、查询数据库关于这个订单锁定库存信息
         *   有：证明库存锁定成功了
         *      解锁：订单状况
         *          1、没有这个订单，必须解锁库存  就是订单微服务调用库存服务后面出现问题导致回滚
         *          2、有这个订单，不一定解锁库存
         *              订单状态：已取消：解锁库存  即用户取消订单或者没有支付的情况
         *                      已支付：不能解锁库存
         */
        WareOrderTaskDetailEntity taskDetailInfo = wareOrderTaskDetailService.getById(detailId);
        if (taskDetailInfo != null) {
            //查出wms_ware_order_task工作单的信息
            Long id = to.getId();//库存总单的id
            WareOrderTaskEntity orderTaskInfo = wareOrderTaskService.getById(id);//库存总单
            //获取订单号查询订单状态
            String orderSn = orderTaskInfo.getOrderSn();
            //远程查询订单信息 调用订单的微服务
            R orderData = orderFeignService.getOrderStatus(orderSn);
            if (orderData.getCode() == 0) {
                //订单数据返回成功
                OrderVo orderInfo = orderData.getData("data", new TypeReference<OrderVo>() {
                });

                // 1.订单出现异常 2.订单超时未支付 解锁库存
                //判断订单状态是否已取消或者支付或者订单不存在
                // 订单状态【0->待付款；1->待发货；2->已发货；3->已完成；4->已关闭；5->无效订单】
                if (orderInfo == null || orderInfo.getStatus() == 4) {
                    //订单已被取消，才能解锁库 并且判断是否
                    if (taskDetailInfo.getLockStatus() == 1) {
                        //当前库存工作单详情状态1，已锁定，但是未解锁才可以解锁
                        unLockStock(detail.getSkuId(), detail.getWareId(), detail.getSkuNum(), detailId);
                    }
                }
            } else {
                //消息拒绝以后重新放在队列里面，让别人继续消费解锁
                //远程调用服务失败
                throw new RuntimeException("远程调用服务失败");
            }
        } else {
            //无需解锁
        }
    }

    /**
     * 解锁库存的方法
     *
     * @param skuId
     * @param wareId
     * @param num
     * @param taskDetailId
     */
    public void unLockStock(Long skuId, Long wareId, Integer num, Long taskDetailId) {
        //库存解锁 wms_ware_sku总单的锁定状态修改 反向补偿 减去锁定状态
        wareSkuDao.unLockStock(skuId, wareId, num);
        //更新具体工作单的状态 具体库存单
        WareOrderTaskDetailEntity taskDetailEntity = new WareOrderTaskDetailEntity();
        taskDetailEntity.setId(taskDetailId);
        //变为已解锁 具体库存单的锁定状态
        taskDetailEntity.setLockStatus(2);  //锁定状态  1-已锁定  2-已解锁  3-扣减
        wareOrderTaskDetailService.updateById(taskDetailEntity);
    }

    //主动逻辑
    //* 防止订单服务卡顿，导致订单状态消息一直改不了，库存优先到期，查订单状态新建，什么都不处理
    // * 导致卡顿的订单，永远都不能解锁库存
    //根据订单服务解锁成功发送给MQ的消息进行解锁库存，保证库存一定解锁成功  主动解锁逻辑
    @Transactional
    @Override
    public void unlockStock(OrderTo to) {
        //拿到订单号
        String orderSn = to.getOrderSn();
        //查询最新的库存解锁状态  防止重复解锁库存
        //总订单id +订单编号
        WareOrderTaskEntity task = wareOrderTaskService.getOrderTaskByOrderSn(orderSn);
        //总库存的订单ID
        Long orderTaskId = task.getId();
        //按照库存工作单id找打所有没有解锁的库存  //1-已锁定  2-已解锁  3-扣减
        List<WareOrderTaskDetailEntity> enties = wareOrderTaskDetailService.list(new QueryWrapper<WareOrderTaskDetailEntity>().
                eq("task_id", orderTaskId)
                .eq("lock_status", 1));

        for (WareOrderTaskDetailEntity taskDetailEntity : enties) {
            unLockStock(taskDetailEntity.getSkuId(),
                    taskDetailEntity.getWareId(),
                    taskDetailEntity.getSkuNum(),
                    taskDetailEntity.getId());
        }
    }
}
